class Node:
    def __init__(self, parent = nill):
        self.parent = parent
        self.skipList = []
        self.gValue = 0
        self.hValue = 0
        self.fValue = 0
        self.children = []

    def generate_children(self):
        pass

    def compute_H(self):
        pass

    def compute_F(self):
        self.fValue = self.gValue + self.hValue